The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 1996
Filed:
Feb. 10, 1995
Darius F Tanksalvala, Denver, CO (US);
Eric R DeLano, Fort Collins, CO (US);
Patrick Knebel, Fort Collins, CO (US);
Thomas R Hotchkiss, Fort Collins, CO (US);
R Craig Simpson, Fort Collins, CO (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
Pipeline structure that is arranged to allow 1.5 cycle access time for both data and instruction cache without imposing additional instruction step delays than that imposed by data and instruction cache that have 1 cycle access time. Half cycle pulses are produced to allow execution of various instructions in 0.5 cycles. A bypass signal is generated to allow data from a current load instruction to be available for a second subsequent instruction even though the access time for data cache is 1.5 cycles. Additionally, a branch address is available for a third subsequent instruction even though instruction cache access time is 1.5 cycles. The present invention shows the initiation of an instruction step for each cycle and 1.5 cycle access time for cache memory. The present invention can also be implemented by implementing an instruction every 2 cycles and providing 3 cycle access time for cache memory.